Rhyhorn, known as the Spikes Pokémon, is a rhinoceros like Pokémon with a rock like hide consisting of plates. Rhyhorn stands on all four legs and evolves into Rhydon. Rhyhorn is a portmanteau of rhinoceros (which it resembles) and horn. Its spelling is also influenced by the rock rhyolite. Its Japanese name is a portmanteau of sai (犀?), meaning rhinoceros and hōn (ホーン?), meaning horn. A Rhyhorn's most well known method of attack is to charge straight into things (which is all it can do as its short legs make it hard for it to turn left or right). A charging Rhyhorn can knock over anything, from trailers to skyscrapers. Its hide is 1000 times harder than human bones. Because they have a one-track mind, Rhyhorn are the prime example of having "more brawn than brains", as they often charge head first into things for little or no reason and often forget why they're charging in the first place. Once a Rhyhorn starts charging, it will not stop until it becomes tired and it doesn't care what (or who) gets in its way. As a testament to how slow-witted it is, a Rhyhorn will charge headlong into a block of steel and not feel any pain until the day after it hit the steel block. In Gold, Silver, and Crystal, Brock uses a Rhyhorn to battle. There is also a Rhyhorn in the Brock Gym Leader set of the trading card game.